2018 ... Catherine T. Lawson · "In August 2018, the 104 attendees of the National Household Travel Survey (NHTS) Workshop shared their experiences with the 2017 NHTS dataset. Researchers and practitioners presented preliminary findings from their research for feedback, insights, and suggestions for future NHTS deployments. This

2018 ... Jeffrey Andrews [and six others] · Recognizing the fundamental role of information flow in future transportation applications, the research team investigated the quality and security of information flow in the connected vehicle (CV) environment. The research team identified key challenges and their potential solutions.

2018 ... Enoch R. Yeh [and four others] · As vehicles become more automated, security issues in automotive systems such as radar and dedicated short-range communication (DSRC) must be thoroughly examined. This report provides an overview and comparison of the inherent security flaws in automotive radar and DSRC

2017 ... Research Performed by: Center for Transportation Research (CTR); Research Supervisor: Stephen Boyles; Researchers: Chandra Bhat [and seven others] · "Transportation planning models are commonly used by US planning agencies to aid decision- making processes. In Texas, a statewide analysis model (SAM) is used for

2017 ... Stephen D. Boyles [and eight others] · Given the difference in scope of statewide and MPO models, inconsistencies between the two levels of modelling are inevitable. There are, however, methods to reduce these inconsistencies. This research provides insight into the current practices of statewide modelling across the USA and

2017 ... [various authors] · "This issue contains twelve papers concerning travel behavior and values. Specific topics covered are as follows: the role of social media in trip planning; digital narratives of place; impact of technology use on multimodality and activity travel characteristics; and inferring activities from social media data.

2017 ... Chandra R. Bhat [and three others] · "This project produced a corridor-based planning tool for TxDOT’s use in planning for future construction of wind farms and the transportation of wind turbine components. The research team organized a three-hour workshop to present the tool’s predictive functionalities in these areas: (1)

2017 ... Sebastian Astroza [and five others] · There will be a significant increase in the number of renewable energy production facilities in Texas. The construction of wind farms requires the transport of wind turbine components that create increased loads on rural roads and bridges. These rural roads and bridges are typically not

2017 ... Sebastian Astroza [and four others]; Research Supervisor: Chandra R. Bhat; · "This tool addresses some of the challenges of operating a demand-responsive transit (DRT) system by determining how well a DRT system serves its riders as well as the most efficient ways to improve this service. The DRT Accessibility Tool is

2017 ... Sebastian Astroza [and six others] · This report discusses the application of the paratransit microsimulation patron accessibility analysis tool developed by the University of Texas researchers. The research team worked on updating the DRT Accessibility Tool developed by the Texas Department of Transportation’s Public

2017 ... Michael Motro [and thirteen others] · This project designs a conceptual framework to harness and mature wireless technology to improve transportation safety, with a focus on frontal collision warning/collision avoidance (CW/CA) systems. The framework identifies components of the technology and its capabilities, and how

2017 ... Research Performed by: Center for Transportation Research; Research Supervisor: Chandra R. Bhat; Researchers: Sebastian Astroza [and four others] · "Constructing wind farms requires the transport of wind turbine components, which will increase loads on rural roads and bridges not typically designed for such loads,

2017 ... Jeffrey Andrews [and six others] · Recognizing the fundamental role of information flow in future transportation applications, the research team investigated the quality and security of information flow in the connected vehicle (CV) environment. The research team identified key challenges and their potential solutions.

2016 ... Robert W. Heath Jr.; Junil Choi [and five others] · As driving becomes more automated, vehicles are being equipped with more sensors generating even higher data rates. Radars (RAdio Detection and Ranging) are used for object detection, visual cameras as virtual mirrors, and LIDARs (LIght Detection and Ranging) for

2016 ... Chandra R. Bhat [and three others] · This paper develops a microeconomic theory-based multiple discrete continuous choice model that considers: (a) that both goods consumption and time allocations (to work and non-work activities) enter separately as decision variables in the utility function, (b) that both time and money

[2016] ... Research Performed by: Center for Transportation Research; Research Supervisor: Chandra Bhat; Researchers: Michael Motro [and twelve others] · "A recent NHTSA report indicates that more than 80% of all annual car crashes could be prevented by vehicular communications. To that end, the focus of this project was to

2016 ... RSG; in association with Matthew Coogan [and six others] · "This report develops an analytical framework or structural plan to improve understanding of how current or potential intercity travelers make the choice to travel by rail. This framework provides guidance for use by practitioners and decision makers considering

2015 ... Chandra Bhat · This study adopts a dwelling unit level of analysis and considers a probabilistic choice set generation approach for residential choice modeling. In doing so, we accommodate the fact that housing choices involve both characteristics of the dwelling unit and its location, while also mimicking the search process that

2015 ... Chandra Bhat · This paper formulates a model that extends the traditional panel discrete choice model to include social/spatial dependencies in the form of dyadic interactions between each pair of decision-makers. In addition, the formulation accommodates spatial correlation effects as well as allows a global spatial structure to be

2015 ... Christina Bernardo, Rajesh Paleti, Megan Hoklas, Chandra Bhat · This paper examines the time-use patterns of adults in dual-earner households with and without children as a function of several individual and household socio-demographics and employment characteristics. A disaggregate activity purpose classification

2015 ... by Jun Deng, Marisol Castro, Chandra R. Bhat · Safety at intersections is of significant interest to transportation professionals due to the large number of possible conflicts that occur at those locations. In particular, rural intersections have been recognized as one of the most hazardous locations on roads. However, most models

2015 ... by Edwin Hard [and eight others] · Travel estimates from models and manuals developed from trip attraction rates having high variances due to few survey observations can reduce confidence and accuracy in estimates. This project compiled and analyzed data from more than a decade of work place and special generator

2015 ... Mason Gemar [and three others] · This report serves as a summary of the research process regarding the application of right-turn slip lanes in the state of Texas. The work plan was divided into three phases: a review of available literature on the design and operation of right-turn slip lanes, focus group meetings to discuss the

2015 ... [E.N. Hard, B.T. Chigoy, L.L. Green, C.R. Bhat, S.K. Dubey] · The purpose of this Manual is to provide a summary of Texas trip generation data for various Land Use Codes (LUCs) and time periods, for data obtained from workplace and special generator (WSG) surveys performed as part of the Texas Travel Survey Program

2015 ... [E.N. Hard, B.T. Chigoy, L.L. Green, C.R. Bhat, S.K. Dubey] · On August 18, 2014, Researchers from TTI and CTR presented a 4-hour workshop to TxDOT as part of their fulfillment of Task 8 for TxDOT Research Project 0-6760. Workshop objectives: Present Texas Trip Generation Manual (How developed / How it can be used, built upon

[2015] ... Zeina Wafa, Chandra R. Bhat, Ram M. Pendyala, Venu M. Garikapati · Spatial transferability of travel demand models has been an issue of considerable interest, particularly for small and medium sized planning areas that often do not have the resources and staff time to collect large scale travel survey data and estimate model

2015 ... by Karen Lorenzini [and five others] · Within Texas, the development of urban travel demand models (TDMs) is a cooperative process between the Texas Department of Transportation and Metropolitan Planning Organizations (MPOs). Though TxDOT - Transportation Planning and Programming Division is responsible for

2014 ... Maren Outwater [and ten others] · "Traditionally, travel models use travel time and cost to assess the usefulness of each mode of transportation to make a particular trip. Other factors that affect the selection of mode are accounted for using a single constant term that represents other attributes. In many cases, these attributes

2014 ... Chandra Bhat, Subodh K. Dubey · In the current paper, we propose a new multinomial probit-based model formulation for integrated choice and latent variable (ICLV) models, which, as we show in the paper, has several important advantages relative to the traditional logit kernel-based ICLV formulation. Combining this MNP-

2014 ... Chandra Bhat · This report presents the basics of the composite marginal likelihood (CML) inference approach, discussing the asymptotic properties of the CML estimator and the advantages and limitations of the approach. The CML inference approach is a relatively simple approach that can be used when the full likelihood

[2014] ... Nan Jiang [and four others] · This work studies the impacts on model performance, sensitivity and results of utilizing different temporal resolution levels for the skims fed to the travel demand component of an integrated ABM-DTA modeling approach. Numerical experiments on real networks will be used to identify trends

[2014] ... Jun Deng [and five others] · "Changing modeling needs over the past few years, spurred by the evolving policy contexts of transportation planning and emerging technologies, have led the planning community to explore tour-based and activity-based modeling paradigms as an alternative to the traditional trip-based modeling

2014 ... Subodh Dubey [and five others] · This project developed a process and framework for generating the inputs needed for estimating a travel mode choice model that includes the transit mode, and developing a framework for implementing the results of an estimated travel mode choice model to project mode shares in

2014 ... Chandra Bhat [and three others] · "The Excel-based forecasting tool allows users to provide a mode choice model along with various skims (in-vehicle travel time, out-of-vehicle travel time, travel distance, and travel cost) in order to calculate the mode share at both the traffic analysis zone (TAZ) level and individual level. It also

[2014] ... Subodh Dubey [and five others] · "On December 18, 2013, the research team hosted a workshop at CTR to gather feedback on and generate discussion of the mode choice model that was developed [as part of Project 0-6766, "A Generic Mode Choice Model Applicable for Small and Medium-Sized MPOs"]. Attendees included

2014 ... Jun Deng [and five others] · Changing modeling needs over the past few years, spurred by the evolving policy contexts of transportation planning and emerging technologies, have led the planning community to explore tour-based and activity-based modeling paradigms as an alternative to the traditional trip-based modeling

[2014] ... Research Performed by: Center for Transportation Research; Research Supervisor: Chandra R. Bhat; Researchers: Marisol Castro [and four others] · "Due to the projected population growth increase in Texas and the continued increase in total motorized vehicle miles traveled in Texas, the Texas Department of Transportation

2014 ... by Megan Kenney [and eight others] · Greenhouse gas (GHG) emissions continue to be an important focus area for state, local, and federal agencies. The transportation sector is the second biggest contributor to GHG emissions in the U.S., and Texas contributes the highest emissions among states in the country. Many

2013 ... Subodh K. Dubey and Chandra R. Bhat · This report formulates a multiple discrete-continuous probit (MDCP) land-use model within a spatially explicit economic structural framework for land-use change decisions. The spatial MDCP model is capable of predicting both the type and intensity of urban development patterns over large

2013 ... Epigmenio Gonzalez [and six others] · The Texas Department of Transportation has been experiencing maintenance budget fluctuations recently. The budget shortage has a negative impact on the agency's maintenance strategies and results in the undesirable deterioration of highway conditions, increasing the risk for both road users

2013 ... Zhanmin Zhang [and eight others] · With the continued increase of demand on Texas highways, the consumption rate of our roads will accelerate due to the constrained funding for maintenance. Our highways represent a multi-billion dollar investment in our transportation system. Given the extent of the Texas highway

2012 ... Palvinder Singh, Rajesh Paleti · The current study contributes to the already substantial literature on telecommuting by estimating a joint model of three dimensions- option, choice and frequency of telecommuting, The unique methodological features of this study include the use of a general and flexible generalized ordered-